Ever since OS4 I have never been able to hide the 'My Number' from the call screen. The option you mentioned to uncheck 'show my number' is definitely a carrier feature, and if supported is to hide your number from the recipient when calling out, not to remove it from the call screen.

Ever since OS4 I have never been able to hide the 'My Number' from the call screen. The option you mentioned to uncheck 'show my number' is definitely a carrier feature, and if supported is to hide your number from the recipient when calling out, not to remove it from the call screen.

Problem is, in that menu, if I select edit phone number nothing happens, I can't type anything so I don't know what to do...

But that weird that you never were able to hide your number, I did it with every single BB I had, maybe I'm the only one...

Provided your SIM card security is Disabled, you should be able to scroll down and highlight the empty Line 1 space, press the Menu, select Edit SIM phone Number and manually input your cell number. Then just back out and save your settings.

I disabled the security but it still doesn't work, when I press edit sim number nothing happens, the menu just disappears and I can't type anything... I guess this doesn't work with all sim cards...

Now the question is, if it worked before, what's the point of the option "show my number" with OS7 if it doesn't (like OS6 or OS5) hide your number on the call screen?

No idea why you're not able to edit your SIM number, but I owe you an apology...

I was mixing up the 'show My Number' option with 'Restrict My Identity'.

With 'show My Number' unchecked, it does remove your number from the top of the call screen when you press the left hand call button, but it does not remove it from the screen that comes up when you're actually in a call. That is the screen that I've never been able to hide my number on.

Restrict My Identity is a carrier feature which hides your number when calling out, if your carrier supports it. Sorry about the confusion there.